We can no longer ________ to consider water an almostfree resource that we can use as much as we like.

Jack，you look tired today.What’s wrong? — I was _______busy _______ I didn’t go to bed until midnight yesterday.

Yesterday my brother a story-book from the library, but he it to Mike minutes ago.

Mark Twain _____ along the Mississippi River, which was _____ to his writing

— Are all the telephone numbers _____ in the directory? — I’m afraid not [ ]